summaryrefslogtreecommitdiff
path: root/mysql-test/main/sp-cursor.result
blob: 83b05264339c77bc7ad081877950b09aeaa183b4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
#
# MDEV-12457 Cursors with parameters
#
CREATE TABLE t1 (a INT, b VARCHAR(10)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,'old'),(2,'old'),(3,'old'),(4,'old'),(5,'old');
CREATE PROCEDURE p1(min INT,max INT)
BEGIN
DECLARE done INT DEFAULT FALSE;
DECLARE va INT;
DECLARE cur CURSOR(pmin INT, pmax INT) FOR SELECT a FROM t1 WHERE a BETWEEN pmin AND pmax;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN cur(min,max);
read_loop: LOOP
FETCH cur INTO va;
IF done THEN
LEAVE read_loop;
END IF;
INSERT INTO t1 VALUES (va,'new');
END LOOP;
CLOSE cur; 
END;
$$
CALL p1(2,4);
SELECT * FROM t1 ORDER BY b DESC,a;
a	b
1	old
2	old
3	old
4	old
5	old
2	new
3	new
4	new
DROP PROCEDURE p1;
DROP TABLE t1;
#
# OPEN with a wrong number of parameters
#
CREATE TABLE t1 (a INT, b VARCHAR(10));
CREATE PROCEDURE p1(a_a INT,a_b VARCHAR(32))
BEGIN
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_a INT, p_b VARCHAR(32)) FOR SELECT * FROM t1 WHERE a=p_a;
OPEN c(a_a);
CLOSE c;
END;
$$
ERROR 42000: Incorrect parameter count to cursor 'c'
DROP TABLE t1;
#
# Cursor parameters are not visible outside of the cursor
#
CREATE PROCEDURE p1(a_a INT)
BEGIN
DECLARE v_a INT;
DECLARE c CURSOR (p_a INT) FOR SELECT a FROM t1 WHERE a=p_a;
OPEN c(a_a);
SET p_a=10;
END;
$$
ERROR HY000: Unknown system variable 'p_a'
CREATE PROCEDURE p1(a_a INT)
BEGIN
DECLARE v_a INT;
DECLARE c CURSOR (p_a INT) FOR SELECT a FROM t1 WHERE a=p_a;
SET p_a= 10;
OPEN c(a_a);
END;
$$
ERROR HY000: Unknown system variable 'p_a'
#
# Cursor parameter shadowing a local variable
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1);
CREATE PROCEDURE p1(a INT)
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a INT DEFAULT NULL;
DECLARE p_a INT DEFAULT NULL;
DECLARE c CURSOR (p_a VARCHAR(32)) FOR SELECT p_a FROM t1;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c(a);
read_loop: LOOP
FETCH c INTO v_a;
IF done THEN
LEAVE read_loop;
END IF;
SELECT v_a;
END LOOP;
CLOSE c;
END;
$$
CALL p1(1);
v_a
1
CALL p1(NULL);
v_a
NULL
DROP PROCEDURE p1;
DROP TABLE t1;
#
# Parameters in SELECT list
#
CREATE PROCEDURE p1(a_a INT, a_b VARCHAR(32))
BEGIN
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_a INT, p_b VARCHAR(32)) FOR SELECT p_a,p_b FROM DUAL;
OPEN c(a_a + 0,a_b);
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
CLOSE c;
OPEN c(a_a + 1,a_b);
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
CLOSE c;
END;
$$
CALL p1(1,'b1');
v_a	v_b
1	b1
v_a	v_b
2	b1
DROP PROCEDURE p1;
#
# Parameters in SELECT list + UNION
#
CREATE PROCEDURE p1(a_a INT, a_b VARCHAR(32))
BEGIN
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR(p_a INT, p_b VARCHAR(32)) FOR
SELECT p_a,p_b FROM DUAL
UNION ALL
SELECT p_a+1,CONCAT(p_b,'b') FROM DUAL;
OPEN c(a_a,a_b);
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
CLOSE c;
END;
$$
CALL p1(1,'b1');
v_a	v_b
1	b1
v_a	v_b
2	b1b
DROP PROCEDURE p1;
#
# Parameters in SELECT list + type conversion + warnings
#
SET sql_mode='';
CREATE PROCEDURE p1(a_a VARCHAR(32))
BEGIN
DECLARE v_a INT;
DECLARE c CURSOR (p_a INT) FOR SELECT p_a FROM DUAL;
OPEN c(a_a);
FETCH c INTO v_a;
SELECT v_a;
CLOSE c;
END;
$$
CALL p1('1b');
v_a
1
Warnings:
Warning	1265	Data truncated for column 'p_a' at row 0
CALL p1('b1');
v_a
0
Warnings:
Warning	1366	Incorrect integer value: 'b1' for column ``.``.`p_a` at row 0
DROP PROCEDURE p1;
SET sql_mode=DEFAULT;
#
# One parameter in SELECT list + subselect
#
CREATE PROCEDURE p1(a_a VARCHAR(32))
BEGIN
DECLARE v_a VARCHAR(10);
DECLARE c CURSOR (p_a VARCHAR(32)) FOR
SELECT p_a FROM DUAL UNION SELECT REVERSE(p_a) FROM DUAL;
OPEN c((SELECT a_a));
FETCH c INTO v_a;
SELECT v_a;
FETCH c INTO v_a;
SELECT v_a;
CLOSE c;
END;
$$
CALL p1('ab');
v_a
ab
v_a
ba
DROP PROCEDURE p1;
#
# Two parameters in SELECT list + subselect
#
CREATE PROCEDURE p1()
BEGIN
DECLARE v_a VARCHAR(32);
DECLARE v_b VARCHAR(32);
DECLARE c CURSOR (p_a VARCHAR(32), p_b VARCHAR(32)) FOR
SELECT p_a, p_b FROM DUAL
UNION
SELECT p_b, p_a FROM DUAL;
OPEN c((SELECT 'aaa'),(SELECT 'bbb'));
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
FETCH c INTO v_a, v_b;
SELECT v_a, v_b;
CLOSE c;
END;
$$
CALL p1();
v_a	v_b
aaa	bbb
v_a	v_b
bbb	aaa
DROP PROCEDURE p1;
#
# Two parameters in SELECT list + two parameters in WHERE + subselects
#
CREATE PROCEDURE p1(a_a VARCHAR(32), a_b VARCHAR(32))
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a VARCHAR(32);
DECLARE v_b VARCHAR(32);
DECLARE c CURSOR (value_a VARCHAR(32), value_b VARCHAR(32),
pattern_a VARCHAR(32), pattern_b VARCHAR(32)) FOR
SELECT value_a, value_b FROM DUAL WHERE value_a LIKE pattern_a
UNION
SELECT value_b, value_a FROM DUAL WHERE value_b LIKE pattern_b;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c((SELECT 'aaa'),(SELECT 'bbb'),(SELECT a_a),(SELECT a_b));
read_loop: LOOP
FETCH c INTO v_a, v_b;
IF done THEN
LEAVE read_loop;
END IF;
SELECT v_a, v_b;
END LOOP;
CLOSE c;
END;
$$
CALL p1('%','%');
v_a	v_b
aaa	bbb
v_a	v_b
bbb	aaa
CALL p1('aaa','xxx');
v_a	v_b
aaa	bbb
CALL p1('xxx','bbb');
v_a	v_b
bbb	aaa
CALL p1('xxx','xxx');
DROP PROCEDURE p1;
#
# Parameters in SELECT list + stored function
#
CREATE FUNCTION f1 (a VARCHAR(32)) RETURNS VARCHAR(32)
BEGIN
RETURN CONCAT(a,'y');
END;
$$
CREATE PROCEDURE p1(a_a VARCHAR(32))
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a VARCHAR(10);
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_sel_a VARCHAR(32), p_cmp_a VARCHAR(32)) FOR
SELECT p_sel_a, p_cmp_a FROM DUAL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c(f1(a_a), f1(a_a));
read_loop: LOOP
FETCH c INTO v_a, v_b;
IF done THEN
LEAVE read_loop;
END IF;
SELECT v_a, v_b;
END LOOP;
CLOSE c;
END;
$$
CALL p1('x');
v_a	v_b
xy	xy
CALL p1(f1(COALESCE(NULL, f1('x'))));
v_a	v_b
xyyy	xyyy
DROP PROCEDURE p1;
DROP FUNCTION f1;
#
# One parameter in WHERE clause
#
CREATE TABLE t1 (a INT, b VARCHAR(10));
CREATE TABLE t2 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'11');
INSERT INTO t1 VALUES (1,'12');
INSERT INTO t1 VALUES (2,'21');
INSERT INTO t1 VALUES (2,'22');
INSERT INTO t1 VALUES (3,'31');
INSERT INTO t1 VALUES (3,'32');
CREATE PROCEDURE p1(a_a INT)
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_a INT) FOR SELECT a,b FROM t1 WHERE a=p_a;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c(a_a);
read_loop: LOOP
FETCH c INTO v_a, v_b;
IF done THEN
LEAVE read_loop;
END IF;
INSERT INTO t2 VALUES (v_a,v_b);
END LOOP;
CLOSE c;
END;
$$
CALL p1(1);
SELECT * FROM t2;
a	b
1	11
1	12
DROP TABLE t1;
DROP TABLE t2;
DROP PROCEDURE p1;
#
# Two parameters in WHERE clause
#
CREATE TABLE t1 (a INT, b VARCHAR(10));
CREATE TABLE t2 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'11');
INSERT INTO t1 VALUES (1,'12');
INSERT INTO t1 VALUES (2,'21');
INSERT INTO t1 VALUES (2,'22');
INSERT INTO t1 VALUES (3,'31');
INSERT INTO t1 VALUES (3,'32');
CREATE PROCEDURE p1(a_a INT, a_b VARCHAR(32))
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_a INT, p_b VARCHAR(32)) FOR SELECT a,b FROM t1 WHERE a=p_a AND b=p_b;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c(a_a, a_b);
read_loop: LOOP
FETCH c INTO v_a, v_b;
IF done THEN
LEAVE read_loop;
END IF;
INSERT INTO t2 VALUES (v_a,v_b);
END LOOP;
CLOSE c;
END;
$$
CALL p1(1,'11');
SELECT * FROM t2;
a	b
1	11
DROP TABLE t1;
DROP TABLE t2;
DROP PROCEDURE p1;
#
# Parameters in WHERE and HAVING clauses
#
CREATE TABLE t1 (name VARCHAR(10), value INT);
INSERT INTO t1 VALUES ('but',1);
INSERT INTO t1 VALUES ('but',1);
INSERT INTO t1 VALUES ('but',1);
INSERT INTO t1 VALUES ('bin',1);
INSERT INTO t1 VALUES ('bin',1);
INSERT INTO t1 VALUES ('bot',1);
CREATE PROCEDURE p1 (arg_name_limit VARCHAR(32), arg_total_limit INT)
BEGIN
DECLARE i INT DEFAULT 0;
DECLARE v_name VARCHAR(10);
DECLARE v_total INT;
-- +0 is needed to work around the bug MDEV-11081
DECLARE c CURSOR(p_v INT) FOR
SELECT name, SUM(value + p_v) + 0 AS total FROM t1
WHERE name LIKE arg_name_limit
GROUP BY name HAVING total>=arg_total_limit;
WHILE i < 2 DO
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
OPEN c(i);
read_loop: LOOP
FETCH c INTO v_name, v_total;
IF done THEN
LEAVE read_loop;
END IF;
SELECT v_name, v_total;
END LOOP;
CLOSE c;
SET i= i + 1;
END;
END WHILE;
END;
$$
CALL p1('%', 2);
v_name	v_total
bin	2
v_name	v_total
but	3
v_name	v_total
bin	4
v_name	v_total
bot	2
v_name	v_total
but	6
CALL p1('b_t', 0);
v_name	v_total
bot	1
v_name	v_total
but	3
v_name	v_total
bot	2
v_name	v_total
but	6
DROP PROCEDURE p1;
DROP TABLE t1;
#
# One parameter in LIMIT clause
#
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'b1');
INSERT INTO t1 VALUES (2,'b2');
INSERT INTO t1 VALUES (3,'b3');
INSERT INTO t1 VALUES (4,'b4');
INSERT INTO t1 VALUES (5,'b5');
INSERT INTO t1 VALUES (6,'b6');
CREATE PROCEDURE p1(a_a INT)
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE v_a INT;
DECLARE v_b VARCHAR(10);
DECLARE c CURSOR (p_a INT) FOR SELECT a,b FROM t1 ORDER BY a LIMIT p_a;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;
CREATE TABLE t2 (a INT, b VARCHAR(10));
OPEN c(a_a);
read_loop: LOOP
FETCH c INTO v_a, v_b;
IF done THEN
LEAVE read_loop;
END IF;
INSERT INTO t2 VALUES (v_a,v_b);
END LOOP;
CLOSE c;
SELECT * FROM t2;
DROP TABLE t2;
END;
$$
CALL p1(1);
a	b
1	b1
CALL p1(3);
a	b
1	b1
2	b2
3	b3
CALL p1(6);
a	b
1	b1
2	b2
3	b3
4	b4
5	b5
6	b6
DROP TABLE t1;
DROP PROCEDURE p1;
#
# End of MDEV-12457 Cursors with parameters
#
#
# MDEV-14415 Add Oracle-style FOR loop to sql_mode=DEFAULT
#
# Explicit cursor
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'b1'), (2,'b2'), (3,'b3');
BEGIN NOT ATOMIC
DECLARE cur CURSOR FOR SELECT * FROM t1;
FOR rec IN cur
DO
SELECT rec.a AS a, rec.b AS b;
END FOR;
END;
$$
a	b
1	b1
a	b
2	b2
a	b
3	b3
DROP TABLE t1;
# Explicit cursor with parameters
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES (1,'b1'), (2,'b2'), (3,'b3');
BEGIN NOT ATOMIC
DECLARE cur CURSOR(pa INT) FOR SELECT * FROM t1 WHERE a>=pa;
FOR rec IN cur(2)
DO
SELECT rec.a AS a, rec.b AS b;
END FOR;
END;
$$
a	b
2	b2
a	b
3	b3
DROP TABLE t1;
# Explicit cursor + label
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES ('1','b1'), ('2','b2');
BEGIN NOT ATOMIC
DECLARE cur CURSOR FOR SELECT * FROM t1;
forrec:
FOR rec IN cur
DO
SELECT rec.a AS a, rec.b AS b;
IF rec.a = 2 THEN
LEAVE forrec;
END IF;
END FOR forrec;
END;
$$
a	b
1	b1
a	b
2	b2
DROP TABLE t1;
# Explicit cursor + FETCH inside the loop body produce an error on "NOT FOUND"
BEGIN NOT ATOMIC
DECLARE x INT;
DECLARE cur CURSOR FOR SELECT 1 AS x;
FOR rec IN cur
DO
FETCH cur INTO x;
END FOR;
END;
$$
ERROR 02000: No data - zero rows fetched, selected, or processed
# Explicit cursor + FETCH inside the loop body are normally handled by "HANDLER FOR NOT FOUND"
BEGIN NOT ATOMIC
DECLARE done INT DEFAULT 0;
DECLARE cur CURSOR FOR SELECT 1 AS x, 'y1' AS y UNION
SELECT 2,'y2' UNION
SELECT 3,'y3';
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
forrec:
FOR rec IN cur
DO
SELECT CONCAT(rec.x, ' ', rec.y) AS 'Implicit FETCH';
FETCH cur INTO rec;
IF done THEN
SELECT 'NO DATA' AS `Explicit FETCH`;
LEAVE forrec;
ELSE
SELECT CONCAT(rec.x, ' ', rec.y) AS 'Explicit FETCH';
END IF;
END FOR;
END;
$$
Implicit FETCH
1 y1
Explicit FETCH
2 y2
Implicit FETCH
3 y3
Explicit FETCH
NO DATA
# Implicit cursor
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES ('1','b1'), ('2','b2');
BEGIN NOT ATOMIC
FOR rec IN (SELECT * FROM t1)
DO
SELECT rec.a AS a, rec.b AS b;
END FOR;
END;
$$
a	b
1	b1
a	b
2	b2
DROP TABLE t1;
# Implicit cursor + label
CREATE TABLE t1 (a INT, b VARCHAR(10));
INSERT INTO t1 VALUES ('1','b1'), ('2','b2');
BEGIN NOT ATOMIC
forrec:
FOR rec IN (SELECT * FROM t1)
DO
SELECT rec.a AS a, rec.b AS b;
IF rec.a = 2 THEN
LEAVE forrec;
END IF;
END FOR;
END;
$$
a	b
1	b1
a	b
2	b2
DROP TABLE t1;
#
# MDEV-15941 Explicit cursor FOR loop does not close the cursor
#
BEGIN NOT ATOMIC
DECLARE v INT;
DECLARE cur CURSOR FOR SELECT 1 AS a FROM DUAL;
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
FETCH cur INTO v;
END;
$$
rec.a
1
ERROR 24000: Cursor is not open
BEGIN NOT ATOMIC
DECLARE v INT;
DECLARE cur CURSOR FOR SELECT 1 AS a FROM DUAL;
label:
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
FETCH cur INTO v;
END;
$$
rec.a
1
ERROR 24000: Cursor is not open
BEGIN NOT ATOMIC
DECLARE cur CURSOR FOR SELECT 1 AS a FROM DUAL;
OPEN cur;
FOR rec IN cur DO
SELECT rec.a;
END FOR;
END;
$$
ERROR 24000: Cursor is already open
BEGIN NOT ATOMIC
DECLARE cur CURSOR FOR SELECT 1 AS a FROM DUAL;
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
END;
$$
rec.a
1
rec.a
1
BEGIN NOT ATOMIC
DECLARE cur CURSOR FOR SELECT 1 AS a FROM DUAL;
label1:
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
label2:
FOR rec IN cur
DO
SELECT rec.a;
END FOR;
END;
$$
rec.a
1
rec.a
1
#
# MDEV-16584 SP with a cursor inside a loop wastes THD memory aggressively
#
CREATE PROCEDURE p1()
BEGIN
DECLARE mem_used_old BIGINT UNSIGNED DEFAULT
(SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS
WHERE VARIABLE_NAME='MEMORY_USED');
DECLARE i INT DEFAULT 1;
WHILE i <= 5000
DO
BEGIN
DECLARE msg TEXT;
DECLARE mem_used_cur BIGINT UNSIGNED DEFAULT
(SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_STATUS
WHERE VARIABLE_NAME='MEMORY_USED');
DECLARE cur CURSOR FOR SELECT 1 FROM DUAL;
IF (mem_used_cur >= mem_used_old * 2) THEN
SHOW STATUS LIKE 'Memory_used';
SET msg=CONCAT('Memory leak detected: i=', i, ' mem_used_old=',mem_used_old,' mem_used_cur=', mem_used_cur);
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT=msg;
END IF;
END;
SET i=i+1;
END WHILE;
END;
$$
CALL p1;
DROP PROCEDURE p1;
#
# MDEV-17278 CURSOR FOR LOOP - ERROR: unexpected end of stream, read 0 bytes (SERVER CRASH)
#
CREATE TABLE t1 (id2 int, id int, en1 enum('aaa','a','b','c'));
INSERT INTO t1 VALUES(1,1,'aaa'),(2,2,'a'),(3,3,'b'),(4,4,'c');
CREATE PROCEDURE p1()
BEGIN
FOR rec IN (SELECT en1 FROM t1)
DO
SELECT rec.en1;
END FOR;
END;
$$
CALL p1();
rec.en1
aaa
rec.en1
a
rec.en1
b
rec.en1
c
DROP PROCEDURE p1;
DROP TABLE t1;
#
# MDEV-26009: Server crash when calling twice procedure using FOR-loop
#
CREATE TABLE t1 ( id int, name varchar(24));
INSERT INTO t1 values (1, 'x'), (2, 'y'), (3, 'z');
create function get_name(_id int) returns varchar(24)
return (select name from t1 where id = _id);
select get_name(id) from t1;
get_name(id)
x
y
z
create  procedure test_proc()
begin
declare _cur cursor for select get_name(id) from t1;
for row in _cur do select 1; end for;
end;
^^
call test_proc();
1
1
1
1
1
1
call test_proc();
1
1
1
1
1
1
drop procedure test_proc;
drop function get_name;
drop table t1;
CREATE TABLE t1 (id int, name varchar(24));
INSERT INTO t1 (id, name) VALUES (1, 'x'),(2, 'y'),(3, 'z');
create function get_name(_id int) returns varchar(24) 
return (select name from t1 where id = _id);
create view v1 as select get_name(id) from t1;
create  procedure test_proc()
begin
declare _cur cursor for select 1 from v1;   
for row in _cur do select 1; end for;
end$$
call test_proc();
1
1
1
1
1
1
call test_proc();
1
1
1
1
1
1
drop procedure test_proc;
drop view v1;
drop function get_name;
drop table t1;
#
# MDEV-28266: Crash in Field_string::type_handler when calling procedures
#
CREATE TABLE t (f INT);
CREATE TRIGGER tr AFTER INSERT ON t FOR EACH ROW
FOR x IN (SELECT * FROM json_table(NULL, '$' COLUMNS(a CHAR(1) path '$.*')) tmp)
DO set @a=1; END FOR $
INSERT INTO t () values ();
DROP TABLE t;
#
# End of 10.6 tests
#
#
# Start of 10.8 tests
#
#
# MDEV-10654 IN, OUT, INOUT parameters in CREATE FUNCTION
#
BEGIN NOT ATOMIC
DECLARE va INT;
DECLARE cur CURSOR (IN a INT) FOR SELECT a FROM dual;
OPEN cur(1);
FETCH cur INTO va;
CLOSE cur;
SELECT va;
END;
$$
va
1
BEGIN NOT ATOMIC
DECLARE va INT;
DECLARE cur CURSOR (OUT a INT) FOR SELECT a FROM dual;
OPEN cur(1);
FETCH cur INTO va;
CLOSE cur;
SELECT va;
END;
$$
ERROR 42000: This version of MariaDB doesn't yet support 'OUT/INOUT cursor parameter'
BEGIN NOT ATOMIC
DECLARE va INT;
DECLARE cur CURSOR (INOUT a INT) FOR SELECT a FROM dual;
OPEN cur(1);
FETCH cur INTO va;
CLOSE cur;
SELECT va;
END;
$$
ERROR 42000: This version of MariaDB doesn't yet support 'OUT/INOUT cursor parameter'
#
# End of 10.8 tests
#